The activity of the quaternary protoberberinium salts with an aromatic ring C such as berberine was higher than that of the quaternary salts such as the N-metho- salts or the N-oxides of tetrahydro-
and dihydroderivatives as well as tertiary tetrahydroproto-berberines.
etiocholanolone Aldosterone Allo-tetrahydro-
corticosterone Tetra hydrocorticosterone 11-dehydro tetrahydro-
corticosterone TSH Not available Free T3 T4 (Total Free T4 and/or free) T3 (Total THE/THF ratio and/or free) rT3 Thyroid antibodies Commentary: Serum panels are standard for thyroid evaluation and have the most comprehensive panels.
Other derivatives, including the dihydro- and tetrahydro-
compounds have also been prepared and characterized, and are being used in a structure-function study.